Radiative Decay of the ψ(2S) into Two Pseudoscalar Mesons

Details Radiative Decay of the ψ(2S) into Two Pseudoscalar Mesons Radiative Decay of the ψ(2S) into Two Pseudoscalar Mesons

2001-09-26

arxiv.org/abs/hep-ex/0109040v1

Phys.Rev.D67:032004,2003

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 5 figures

Scientific paper

10.1103/PhysRevD.67.032004

Radiative decays of the radially excited charmonium resonance, \psi(2S), into \pi\pi, K Kbar and \eta\eta final states have been measured in a sample of 3.96 * 10^6 \psi(2S) events collected by the BES collaboration. The branching ratios B(\psi(2S) -> \gamma f_{2}(1270)) = (2.27 +- 0.26 +- 0.39) * 10^{-4} and B(\psi(2S) -> \gamma f_0(1710)) * B(f_0(1710) -> K^+ K^-) = (5.59 +- 1.12 +- 0.93) * 10^{-5} are obtained. When compared to the corresponding radiative J/\psi decays, the observed \psi(2S) radiative decay rates into \gamma f_2(1270) and \gamma f_0(1710) are consistent with the 15% rule.

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